Breefield

var page = require('webpage').create();

// User-Agent is supported through page.settings
page.settings.userAgent = 'Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25';

// This is how you set other header variables
page.customHeaders = {'Referer': 'localhost'};